HOW TO CREATE: EF CORE PROJECT
==============================
example is for sqlite but the same works with MsSql


nuget
Microsoft.EntityFrameworkCore.Tools (needed for using Package Manager Console)
Microsoft.EntityFrameworkCore.Sqlite

MIGRATIONS
  require core, not standard
  this can be a problem b/c standard and framework can only reference standard, not core
TO USE MIGRATIONS (core and/or standard)
  add to csproj
    <PropertyGroup>
      <GenerateRuntimeConfigurationFiles>true</GenerateRuntimeConfigurationFiles>
    </PropertyGroup>
TO USE MIGRATIONS AS *BOTH* CORE AND STANDARD
  edit csproj
    pluralize this xml tag
      from: TargetFramework
      to: TargetFrameworks
    inside of TargetFrameworks
      from: netstandard2.1
      to: netcoreapp3.1;netstandard2.1

run. error
SQLite Error 1: 'no such table: Blogs'.

set project "Set as StartUp Project"

Tools >> Nuget Package Manager >> Package Manager Console
default project: Examples\SQLite_NETCore2_0

PM> add-migration InitialCreate
PM> Update-Database

if add-migration xyz throws and error, don't take the error msg at face value. try again with add-migration xyz -verbose

new sqlite .db file created: Copy always/Copy if newer
or copy .db file to destination

relative:
   optionsBuilder.UseSqlite("Data Source=blogging.db");
absolute  (use fwd slashes):
   optionsBuilder.UseSqlite("Data Source=C:/foo/bar/blogging.db");


REFERENCE ARTICLES
------------------
https://docs.microsoft.com/en-us/ef/core/get-started/netcore/new-db-sqlite
https://carlos.mendible.com/2016/07/11/step-by-step-dotnet-core-and-entity-framework-core/
https://www.benday.com/2017/12/19/ef-core-2-0-migrations-without-hard-coded-connection-strings/